Step 2: Then it can open Command Prompt as administrator. You can type net user username /add and press Enter to add a new user account for Windows 10, type net user username password to change password for the user account, or type net user username /delete to delete the user account from Windows 10.

Tips: If you are not sure the names of the user accounts on your Windows 10, just type net user and press Enter so that it will display all user accounts.

How to add or modify user accounts without login Windows 10

You may be unable to sign in your Windows 10 for some cases, such as forgetting password. In this case, you can add new user accounts and modify password for your user accounts with the help of the third-party program Windows Password Refixer.